@book{bhlitem18061, title = {Proceedings of the Academy of Natural Sciences of Philadelphia }, volume = {v.18 (1866)}, copyright = {Public domain. The BHL considers that this work is no longer under copyright protection.}, url = {https://www.biodiversitylibrary.org/item/18061}, note = {https://www.biodiversitylibrary.org/bibliography/6885}, publisher = {Philadelphia, Academy of Natural Sciences of Philadelphia, }, author = {Academy of Natural Sciences of Philadelphia.}, year = {1866}, pages = {492}, keywords = {Natural history|Natuurwetenschappen|Periodicals|Science}, }